Design Tools are becoming more and more important in the development of software as their capabilities and ease of use grows. The majority of design tools for software development use the Unified Modeling Language (UML). Some of these tools generate source code from UML diagrams. Some of them also generate UML diagrams from source code. Some of these tools automatically synchronize the code and UML model diagrams as you change one or the other.

There is a wide variety of price ranges for these tools, from free to quite expensive. Hopefully you can find some information from these pages to help you in your decision about which design tool is most appropriate for your needs.